Exhibit 3.1

Certificate of Incorporation

FOURTH AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

MAKO SURGICAL CORP.

FIRST:  The name of the Corporation is MAKO Surgical Corp. (the “Corporation”).

SECOND:  The address of the registered office of the Corporation in the State of Delaware is 1209 Orange Street, Wilmington, County of New Castle, Delaware 19801. The name of its registered agent at that address is The Corporation Trust Company.

THIRD:  The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of the State of Delaware as set forth in Title 8 of the Delaware Code (the “GCL”).

FOURTH:  The total number of shares of stock which the Corporation shall have authority to issue is 1,000 shares of Common Stock, each having a par value of one tenth of one cent ($0.001).

FIFTH:  The following provisions are inserted for the management of the business and the conduct of the affairs of the Corporation, and for further definition, limitation and regulation of the powers of the Corporation and of its directors and stockholders:

(1)  The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors.

(2)  The directors shall have concurrent power with the stockholders to make, alter, amend, change, add to or repeal the By-Laws of the Corporation.

(3)  The number of directors of the Corporation shall be as from time to time fixed by, or in the manner provided in, the By-Laws of the Corporation. Election of directors need not be by written ballot unless the By-Laws so provide.

(4)  In addition to the powers and authority hereinbefore or by statute expressly conferred upon them, the directors are hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the GCL, this Certificate of Incorporation, and any By-Laws adopted by the stockholders; provided, however, that no By-Laws hereafter adopted by the stockholders shall invalidate any prior act of the directors which would have been valid if such By-Laws had not been adopted.

SIXTH:  Meetings of stockholders may be held within or without the State of Delaware, as the By-Laws may provide. The books of the Corporation may be kept (subject to any provision contained in the GCL) outside the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the By-Laws of the Corporation.

SEVENTH:  The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred upon stockholders herein are granted subject to this reservation.

EIGHTH:  A director of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director occurring at or prior to the effective time (the “Effective Time”) of the merger of Lauderdale Merger Corporation, a Delaware corporation (“Merger Sub”), with and into the Corporation pursuant to the Agreement and Plan of Merger, dated September 25, 2013, by and among Merger Sub, Stryker Corporation and the Corporation, except for liability (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the GCL or (iv) for any transaction from which the director derived any improper personal benefit. If the GCL is amended after the filing of this Certificate of Incorporation to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of a director of the Corporation shall be eliminated or limited to the fullest extent permitted by the GCL, as so amended. No modification or repeal of the provisions of this Article EIGHTH shall adversely affect any right or protection of any director of the Corporation existing at the date of such modification or repeal or create any liability or adversely affect any such right or protection for any acts or omissions of such director occurring prior to such modification or repeal.

NINTH:  To the fullest extent permitted by applicable law, the Corporation is authorized to provide indemnification of (and advancement of expenses to) directors, officers and agents of the Corporation (and any other persons to which the GCL permits the Corporation to provide indemnification) for acts or omissions occurring or alleged to have occurred at or prior to the Effective Time through By-Law provisions, agreements with such directors, officers or agents, vote of stockholders or disinterested directors or otherwise, in excess of the indemnification and advancement otherwise permitted by Section 145 of the GCL, subject only to limits created by applicable GCL (statutory or non-statutory), with respect to actions for breach of duty to this corporation, its stockholders, and others. Any amendment, repeal or modification of the foregoing provisions of this Article NINTH shall not adversely affect any right or protection of a director, officer or agent, or other person existing at the time of, or increase the liability of any director of the Corporation with respect to any acts or omissions of such director, officer or agent occurring prior to, such amendment, repeal or modification.